The Lafayette Police Department said it has received a number of calls about a low pitched humming sound.

The department said the frigid temperatures are causing transformers and power lines to create the humming noise.

It is a byproduct of the extra electricity it takes to heat homes across the area. Duke Energy Spokesperson Lou Middleton said this is a normal occurrence and there is nothing to be alarmed about.

"What's happening here is that in the cold weather our customers are drawing large amounts of electricity just to keep warm," said Middleton. "And so as this large amount of electricity moves through the line, it's just characteristic of it to generate a humming sound."